Self-contained recirculating sanitary system

ABSTRACT

A recirculating sanitary system is described which includes an improved filter and pump assembly to provide a source of flushing liquid. A linkage permits pedal or manual actuation of a diaphragm pump which, when driven, supplies the flushing liquid to a bowl. A portion of the flushing liquid is diverted to drive a special pump which injects a deodorizing chemical into the storage tank.

United States Patent Kemper 451 Jan. 1, i972 [5 1] SELF-CONTAINED RECIRCULAT ING SANITARY SYSTEM [72] Inventor: James M. Kemper, Los Angeles, Calif.

[73] Assignee:

Calif.

22 Filed: Aug.19,1970

[21] Appl.No.: 65,095

[5 6] Reierences Cited UNITED STATES PATENTS 3,067,433 12/1962 Dietz etal ..4/78 3,079,612 3/1963 3,228,036 1/1966 3,308,481 3/1967 O'Brien et a1 Z4 w i0 e m i /Z Monogram Industries, Inc.,' Log Angeles, 1

Sargent. ..4/79

3,538,517 11/1970 Cornish et a1 ..4/10 3,579,646 5/1971 Lekberg "14/10 FOREIGN PATENTS OR APPLICATIONS 471,281 9/1937 Great Britain ..4/78

Primary Examiner-Henry K. Artis Attorney-G0love and Kleinberg, Leonard Golove and Marvin H. Kleinberg [57] ABSTRACT A recirculating sanitary system is described which includes an improved filter and pump assembly to provide a source of flushing liquid. A linkage permits pedal or manual actuation of a diaphragm pump which, when driven, supplies the flushing liquid to a bowl. A portion of the flushing liquid is diverted to drive a special pump which injects a deodorizing chemical into the storage tank.

1 1 Claims, 18 Drawing Figures PAIENIEU JAN 1 8 m2 SHEET 1 0F 8 PATENTED JAN 1 8 872 sum 3 or a PATENTED JMH 8 872 SHEET '4 OF 8 PATENIEI] m I am:

SHEET 7 OF 8 PATENTED JAN 1 8872 SHEET 8 OF 8 SELF-CONTAINED RECIRCULATING SANITARY SYSTEM BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to recirculating sanitary systems and, more particularly, to a system including a toilet, a storage tank, and pumping and filtering means for providing a supply of flushing liquid to the toilet. This application is an improvement over my copending Pat. application, Ser. No. 829,486, filed June 2, 1969, which is a continuation-in-part of an earlier application, Ser. No. 737,232, filed June 14, 1968, now abandoned.

2. Description of the Prior Art Circulating sanitary systems have been described and shown in the patents to W. F. Katona, et al., U.S. Pat. No. 3,256,221 and .I. W. Deitz, et al., U.S. Pat. No. 3,067,433. Pneumatically operated recirculating systems have been disclosed in the patents to C. A. Garber, U.S. Pat. No. 3,024,933, and W. D. Hicks, U.S. Pat. No. 3,001,205. 1

The problem of providing sanitary facilities at locations remote from supplies of power and water or from connections to sewage disposal facilities has resulted in the development of chemical toilets. In simplest form, these are enclosures which include a seat having an opening and a storage tank in which waste is collected. From time to time, chemicals of various types are added to the tank in an attempt to control the odors which are generally present. Such portable toilets have been provided for workers at construction sites, for crowds gathering at remote locations, and have also been utilized in parks and beaches where running water and sewage disposal facilities were neither desirable nor available. Such facilities are spartan, at best, and may, because of aesthetic reasons, discourage potential users who might then be forced to utilize the environment in more primitive fashion with the attendant hazards of pollution.

In recent years, with the advent of the electrically operated recirculating sanitary systems, exemplified by the patent to Katona, et al., a portable, self-contained toilet facility could be provided at remote locations. A more conventional toilet with a flushing capability and a reasonably effective odor seal between the storage tank and the toilet unit becomes feasible. Such systems, however, required a source of electrical power, such as an electrical storage battery. Unfortunately, the propensities of civilized society are such that unattended storage batteries frequently disappear, rendering the toilet system substantially inoperative, thus creating a situation less desirable than that which was replaced.

In the above-identified Kemper application, there was disclosed a novel diaphragm pump which, in combination with a novel filter, provided a supply of filtered flushing liquid sufficient for a single operation of the toilet. The diaphragm pump, in that application, was driven alternatively by a pneumatic or hydraulic system. Such a toilet system was primarily intended for use in mobile vehicles such as aircraft, trailers and mobile homes, buses, campers, and boats in which the supply of pneumatic or hydraulic power was readily available. However, the disclosed system was not readily adaptable for use in remote, unattended locations where the frequency of usage is unpre' dictable and where service and maintenance are provided only on a periodic basis.

SUMMARY OF THE INVENTION It has been deemed desirable to have'a portable toilet facility which can adapt the desirable features of a flush toilet to remote, unattended operation. In accordance with the present invention, the apparatus of the copending Kemper application has been modified and improved for remote unattended operation without the need for a power source other than the user.

According to a first embodiment of the present invention, a pedal, capable of being operated by foot pressure, is connected through a mechanical linkage to drive a diaphragm pump of improved design. The diaphragm pump, when operated, provides a supply of filtered flushing liquid to the toilet bowl which then drains to the storage tank. The flush line connects to a small diaphragm pump which, in conjunction with a small chemical supply tank, injects a metered amount of a deodorizing chemical into the storage tank with each operation of the pump.

In a second embodiment, the pedal is connected to a hydraulic system which, in turn, drives the diaphragm pump for the flushing operation. In yet other embodiments, an aspirator may connect the chemical supply tank to the flush line so that a metered amount of chemical can be introduced into the flushing liquid itself.

According to the present invention, the diaphragm flush pump embodies an improved design, susceptible of easy assembly and disassembly. Moreover, the diaphragm, itself, is of improved construction that simplifies production and assembly of the pump. Also, according to the present invention, the filter assembly has been modified to incorporate a selfcleaning feature which prevents buildup of foreign matter on the individual needles of the filter.

The novel features which are believed to be characteristic of the invention, both as to organization and method of operation, together with further objects and advantages thereof will be better understood from the following description considered in connection with the accompanying drawings in which several preferred embodiments of the invention are illustrated by way of example. It is to be expressly understood, however, that the drawings are for the purpose of illustration and description only and are not intended as a definition of the limits of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an idealized diagrammatic representation of the recirculating toilet system of the present invention;

FIG. 2 is an idealized perspective view of an embodiment of the recirculating toilet system of the present invention;

FIG. 3 is a side sectional view of an improved filter pump assembly according to the present invention;

FIG. 4 is a view of the pump of FIG. 3 during actuation;

FIG. 5 is a partly broken away front view of a filter plate and filter needle assembly according to the present invention;

FIG. 6 is a side section view of an alternative arrangement of a filter pin assembly in combination with the pump;

FIG. 7 is a top view of a toilet bowl of the present invention;

FIG. 8 is a side view of the bowl of FIG. 7 taken along 88 in the direction of the appended arrows;

FIG. 9 is a fragmentary detail of the bowl of FIG. 7 showing the connection of the diverter assembly;

FIG. 10 is a view of a hinged portion of the bowl of FIG. 9 taken along line 10-10 in the direction of the arrows;

FIG. 11 is a fragmentary view of the bowl showing a latch assembly;

FIG. 12 is a frontal view of the latch of FIG. 11;

FIG. 13 is an enlarged block diagrammatic view of a chemical injector assembly according to the present invention;

FIG. 14 is a detailed side sectional view of a preferred embodiment of a chemical injector assembly;

FIG. 15 is a side sectional view, idealized, of an aspirator version of a chemical injector assembly according to the present invention;

FIG, 16 is an optical liquid level sensor;

FIG. 17 is a detailed side sectional view of the pedal hydraulic pump assembly of FIG. 1; and

FIG. 18 is a sectional view of the embodiment of FIG. I.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Turning first to FIG. I, there is shown in idealized diagrammatic form in a first embodiment an improved recirculating toilet system according to the present invention. The system 10 includes a tank 12 in which is located a filter pump combination l4 and, in a separate chemical tank 16, there is a secondary chemical injector pump 18.

The filter pump 14 is operated by a pedal and linkage assembly 20 which can be operated by foot pressure, as shown in FIG. 1. The output of the filter pump 14 travels via a flush line 22 to a toilet bowl 24 which drains into the tank 12. In operation, depression of the pedal assembly 20 operates the pump 14 to apply a predetermined amount of flushing liquid through the flush line 22 into the bowl 24. At the same time, a portion of the flush fluid flow is diverted into the chemical pump 18 and a predetermined amount of chemical solution is pumped into the tank 12 for deodorizing and sanitation purposes.

In FIG. 2, there is shown a first embodiment ofa recirculating toilet system 30 according to the present invention. As shown in FIG. 2, the system includes three major subassemblies, including a main filter pump and tank subassembly 32, a bowl assembly 34 and a foot pedal hydraulic pump assembly 36. For convenience, a chemical injector pump assembly 38 is shown as a part of the pump and tank assembly 32, but will be treated separately in the following description.

In operation, actuation of the foot pedal operated hydraulic pump assembly 36 causes the actuation of the filter pump assembly 32 which in turn applies flushing fluid to the bowl assembly 34. Simultaneously, the chemical pump injector as' sembly 38 is actuated to apply a metered amount of fluid to the tank itself.

In the first embodiment, the hydraulic pump assembly 36 has been included so that the toilet system can be operated by a SO-pound youngster or a 250-pound adult without creating substantial problems for either operator. The pedal hydraulic assembly 36 is able to translate the motion applied to to the pedal into a reasonably smooth flow of hydraulic pressure to the diaphragm pump assembly.

FIG. 3 shows, in detail, an improved filter pump combina tion 40 according to the present invention. The filter pump combination 40 includes an upper pan 42 and a lower pan 44 in which a recess 46 is provided to house a filter assembly 48. The filter assembly 48 includes an apertured filter plate 50 having a plurality of orifices 52 and a matching comb plate 54 with a plurality of individual, needlelike projections or teeth 56 which fit in the corresponding orifices 52, similar to that taught in the copending Kemper application, supra. However, at certain predetermined locations in the comb plate 54, individual teeth 56 are omitted and an aperture is provided in the comb plate 54. In the corresponding location in the filter plate 50, no aperture is provided.

In the preferred embodiment, the comb plate 54 is provided with a circumferential flange 58 that aids in the self-cleaning process, as will be more fully described below in connection with FIGS. and 6. The flange 58 encompasses an area on the lower pan 44 that includes a one-way inlet valve 60 that admits filtered flushing liquid to the interior of the driven side of the pump combination 40. A similar, oneway valve 62 functions as an outlet valve into an outlet port 64 which connects to a flush tube 66.

In the interior of the filter pump combination 40, surrounding the recess 46 in which is located the filter assembly 48, there is a return spring 68 that biases a diaphragm member 70 into the unactuated position. The comb plate 54 has a central driving member 72 that protrudes into the interior of the pump combination 40 and is biased in the retracted position by a conical helical spring 74.

The diaphragm 70 of the pump includes a central cylindrical section 76 that is fitted to enclose the introverted recess 46 of the lower pan 44. In addition to the cylindrical section 76 of the diaphragm 70, there is an elastomeric, fluidtight sealing portion 78, whose inner and outer circumferences are bounded by a bead 80, 80' that functions as an O-ring.

A trough 82 is provided in the peripheral edge of a flange surrounding the cylindrical section 76 of the diaphragm 70 to receive the inner circumferential head 80. A ring 84 having a corresponding, complementary trough 86 is fitted over the bead 80 and is fastened to the flange of the cylindrical member 76 to capture the bead 80 in place, in a substantially fluidtight seal.

In similar fashion, the upper and lower pans 42, 44 terminate in a periphery with circular troughs 82', 86', which are adapted to fit over the bead in a substantially fluidtight seal, as well. A collar member 88 is applied to the periphery of the two pans 42, 44 and includes a wedging portion which tends to compress the troughs 82', 86' together over the bead 80, thereby sealing the two halves of the pump combination 40.

An inlet port 90 is provided in the upper pan 42 which is connected to a tube 92 that provides a supply of hydraulic fluid which drives the filter pump combination 40.

A plurality of support members 94 are provided on the lower pan 44 to hold the filter pump combination 40 above the bottom of a storage tank 96, while permitting the teeth 56 of the filter plate combination 48 to have their full range of reciprocating motion.

Turning next to FIG. 4, there is shown the filter pump combination 40 of FIG. 3 in its partly actuated configuration after hydraulic fluid has been applied through the fluid line 92 into the inlet 90 in the upper pan 42. As is shown the cylindrical portion 76 of the diaphragm 70 is contoured to fit substantially over the diaphragm spring 68 and the recess 46. The flexible portion 78 of the diaphragm 70 is arranged to fit the configuration of the lower pan 44 to leave virtually no interior volume between the diaphragm 70 and the lower pan 44 when the pump is in its fully actuated configuration. The fully actuated pump is shown in dotted lines.

The teeth 56 of the filter comb plate 54 are fully extended through the filter plate 50 and virtually the entire contents of the driven side of the pump combination 40 have been displaced through the outlet valve 62 into the flush line 66.

When the mechanical force applied to the pedal hydraulic assembly 36 is removed, the diaphragm return spring 68 forces the diaphragm 70 back into the upper pan 42, thereby forcing hydraulic fluid back into the hydraulic supply line 92. The filter comb plate 54, under the influence of the filter comb helical spring 74, reciprocates through the filter plate 50 as filtered fluid is drawn through the inlet valve 60 into the interior of the driven portion of the pump, defined by the diaphragm assembly 70 and the interior of the lower pan 44. When the flange 58 on the filter comb plate 54 bottoms on the outer surface of the lower pan 44 in the recess 46, the diaphragm 70 has not yet completed its return travel to the unenergized configuration.

Therefore, additional fluid is drawn through the filter and through the several apertures in filter comb plate 54. The apertures, as will be seen from FIG. 5, are so spaced as to cause an agitation in the fluid flow through the inlet valve 60 thereby preventing any buildup of debris or particulate matter on the individual teeth 56. At the limit of travel, the diaphragm 70 displaces substantially all of the hydraulic fluid out of the pump assembly combination 40 and returns the fluid to the hydraulic pump assembly 46.

Turning next to FIG. 5, there is shown a frontal, partly broken away view of the filter plate 50 and the filter comb plate 54 of FIGS. 3 and 4. The individual filter needles 56 are shown in a substantially circular arrangement with periodic omissions. Where the needles 56 have been omitted, an aperture S6 exists to the rear side of the filter comb plate 54. Correspondingly, where needle elements 56 are not present on the filter comb plate 54, an aperture 52 has been omitted from the filter plate 50.

It will then be realized that as fluid is drawn into the interior of the filter, through the filtering area defined by the space between a needle 56 and an aperture 52, a turbulent flow will be set up between the filter plate 50 and the comb plate 54 so long as the flange 58 encloses the inlet valve 60 (best seen in FIGS. 3 and 4).

In FIG. 6, there is shown an alternative embodiment of the comb and filter plate arrangement in which the flange 58 of FIG. 3 has been omitted from the filter comb plate 54. In order to assure a turbulent flow of filtered liquid sufficient to dislodge any particulate matter that may have entered the filter, a pair of inlet one-way valves 60, 60' is provided. The inflow of fluid to the interior of the pump combination 40 can set up a turbulent flow pattern about the needles 56 to prevent the buildup of any particulate matter, functioning much in the same fashion as the flange 58 in the embodiment of FIG. 3.

The bowl assembly 34 is best seen in conjunction with FIGS. 7 and 8 which are a top and side view, respectively, of a bowl assembly suitable for use in the recirculating toilet system of the present invention. The main component is a toilet bowl 102, which is in generally an oval shape having, at its approximate center, a circular opening which empties into a flow diverter 104 that serves as a sight shield from the contents of the tank,

The fluid flush line 66 connects to a manifold 106 that directs flushing liquid circumferentially into the bowl 102 into a flush fluid channel 108. As the fluid velocity diminishes, the fluid leaves the channel 108 and proceeds in a spiral path through the bowl until it reaches the outlet opening and the diverter 104. The channel 108 permits a wide variation in the volumetric flow that can be applied to the bowl 102 without the danger of splashing or spilling. It is such a channel that permits the system of the present invention to be used with equal efficacy by a 50-pound child or a 250-pound adult.

Turning to FIGS. 9 and 10, there is shown in some detail the hinge mechanism 110 which fastens the diverter 104 to the bowl 102. As shown, a simple cotter pin is used as the hinge pin for easy disassembly. A spring catch 112 best seen in FIGS. 11 and 12 holds the diverter 104 in the normal configuration and may include a spring element which bears on a projecting member 114.

It is frequently necessary to gain direct access to the interior of the tank through the bowl 102, for cleaning purposes, or for removing the stored waste products in the tank. In such an event, the hinged diverter 104 can be opened to a substantially vertical position, thereby permitting free access of a large diameter pumping hose into the interior of the tank. When the need for uninterrupted access to the tank is no longer present, the diverter 104 can be rotated about the hinge 110 into its normal position and latched in place using the spring catch 1 12.

Turning next to FIG. 13, there is shown in block diagrammatic form the chemical injector pump assembly 38 of FIG. 2. A power source 118 applies a force to a chemical injector pump 120 which is integrally mounted to a chemical supply tank 122. The output of the pump 120 is applied to an injecting tube 124 which is then directed into the main storage tank Since most deodorizing chemicals lose their effectiveness upon being mixed with water and waste products, it has been deemed advisable to provide a separate chemical supply tank 122 in which the chemical liquid can be stored until used. The pump of the present invention is utilized to provide a metered amount of the chemical deodorizer directly to the storage tank 12 with each utilization of the toilet.

The pump 120 is shown in greater detail in FIG. 14. As shown, the pump includes a lower or driving half 126 and an upper or driven half 128 which can be made integral with the bottom of the supply tank 122.

A flexible, fluid-impervious diaphragm 130 separates the driving from the driven half of the pump 120. A stiffener and stop member 132 is centrally mounted on the diaphragm 130 and cooperates with an adjustable screw member 134 that is located in the tank 122. By adjusting the protrusion of screw member 134 into the driven half of the pump 120, the stroke of the diaphragm 130 and the amount of fluid to be dispensed with each actuation of the pump 120 can be determined. An inlet valve 136 permits fluid to be drawn into the driven side of the pump 120 and a similar outlet valve 138 permits unidirectional flow from the pump into the injecting tube 124, which is applied to the tank 12.

As shown, the output of the pump is initially applied to a chamber 140 which has internal threads 142. A conventional, tapered stopper 144 into which has been placed the injecting tube 124 is then press fitted into place in the outlet chamber 140. The internal threads 142 engage the tapered surface and hold the stopper 144 in place through normal usage while permitting easy removal of the stopper, should the need arise.

In the first embodiment, the driving fluid for the pump is the flush liquid which has been tapped from the flush line and applied to the driving side by the driving fluid line 118. Alternatively, the pedal assembly can provide for a mechanical or hydraulic actuation of the pump.

Turning next to FIG. 15, there is shown an alternative embodiment of the chemical injector pump in which the chemical tank 122 is directly coupled to the flush line 66 by means of a small diameter tube 146, which is connected as an aspirator. In operation, with each energization of the flush cycle, the

fluid flow through the flush line 66 will draw in an amount of the chemical into the flush fluid through the tube 146 depending, of course, upon the relative dimensions of flush line 66, the tube 146, the orifice at the tank 122, and the volumetric flow rate of the flushing liquid.

In FIG. 16, there is shown a liquid level gauge 150 which can be used to determine the height of the fluid in the tank 12. In the prior art, liquid levels sensors utilizing Lucite rods have been described and sold by the FASTEX division of ITW under the trademark since 1968. As has been taught in the prior art, when the liquid level reaches a base of the sensor and covers a tapered portion 152, the taper no longer acts as a reflector of light, but acts as a transmitter. With no light reflected to the upper surface, a darkening of the surface occurs, in the absence of any interior source of illumination.

Since the present level sensor is intended to work in a tank which has no light sources therein, all illumination must be transmitted from the upper surface. To increase the reflected light and, therefore, the brightness of the surface, a reflecting layer 154, which may be a foil sheet, is applied to the upper cylindrical surface of the rod 150. It has been determined that the application of such a reflective layer 154 increases the effectiveness of the sensor and permits the device to function, even in low ambient light level conditions.

In FIG. 17, there is shown, in detail, the pedal-operated diaphragm assembly 36, which is the source of hydraulic fluid to the main filter pump combination 40. The assembly includes a foot pedal which is mounted on a lever arm 162 that terminated in a pivotal bar that is fastened to a sturdy frame member (best seen in FIG, 1),

In alternative embodiments, a return spring may be provided. A driving plunger 168 is pinned to the lever arm 162 and connects to a stiffening plate 170 that is bonded to a diaphragm comprising an elastic, fluid-impermeable mem' brane 172. The membrane 172, which acts as a diaphragm, terminates in a bead 174 and is retained on thelower half of the pump 176 by a strap 178, in a substantially fluidtight engagement. An outlet orifice 180 is provided in the pump body and connects through a suitable tube to the driving side of the filter pump assembly 48. The stiffening plate 170 has a valve member 182 which is used to add hydraulic fluid to the pump and to bleed air therefrom.

When the pedal 160 is depressed, as seen in the dotted outline, the plunger 168 is moved downward, folding the membrane 172 over the upstanding circumferential outline of the lower half of the pump 176. After the conclusion of a flush cycle, the bias spring in the diaphragm pump 40 returns the hydraulic fluid to the assembly 36 and returns the pedal 160 to its normal solid outline position. This action can be supplemented, in alternative embodiments, by a return spring.

In FIG. 18, there is shown an alternative embodiment of the pedal operated sanitary system according to the present invention. A toilet, such as is shown in FIG. 2 of the Katona et al. patent, has been modified to incorporate a filter pump assembly combination such as is shown in the copending Kemper application which, in turn, is directly driven through a linkage by a foot pedal.

With reference to FIG. 18 and the Katona et al. patent, there is shown a tank assembly 210 and a filter pump assembly 212, which is connected to a flush manifold 214 by a hose 216. The flush manifold 214 is integral with a bowl 218 upon which rests a conventional seat 220 and a seat cover 222.

The pump filter combination 212 is operated through a lever arm 224, which is pivotally connected to a driving rod 226. The lever 224, in turn, is pivotally mounted to a bracket 228 and terminates in a foot pedal 230. As can be seen, actuation of the foot pedal 230 applies a vertical reciprocating motion to the rod 226 which operates the filter pump 212, as will be described below.

The driving rod 226 is integral with a supporting plate 232. A diaphragm 234 is held between the plate 232 and a similar backing plate 236. The diaphragm 234 is a flexible, fluid-impervious membrane which is held in a fluidtight seal between a flange 238 of the filter pump body 240 and a stainless steel ring 242 by means of appropriate fastening elements (not shown).

A one-way outlet valve 244 is located in the sidewall of the pump 240 and connects to the flushing hose 216. A filter-plate combination, similar to that shown and described in FIGS. 3, 4, and 5, supra, may be employed in the present embodiment and would include a filter plate 250, having apertures 252, and a corresponding filter comb 254, having filter teeth 256. A filter comb post 258 and a filter comb return spring 260 complete the filter arrangement. A one-way inlet valve 262 admits filtered liquid to the interior of the filter pump combination 212.

With each actuation of the foot pedal 230, the actuating rod 226 and the supporting plates 232, 236 reciprocate the diaphragm 234, pumping flushing liquid with each down stroke of the pedal and refilling the pump interior through the filter with each upstroke of the pedal. A bias return spring 264 is connected between the lever 224 and a base to aid in the filling of the pump 212.

As the diaphragm 234 nears the upper limit of its stroke, the filter comb post 258 is engaged to reciprocate the filter teeth 256 through the apertured filter plate 250, thereby cleaning the filter in the manner described and shown in the copending Kemper application.

A single stroke of the foot pedal 230 should provide flushing liquid sufiicient to completely flush the toilet. However, a plurality of strokes may be employed should the user so desire. With each actuation of the pedal 230, a predetermined amount of flush liquid is pumped through the bowl 218 and the user can determine how much or how little flushing liquid is required for each utilization of the toilet.

Thus, there has been described an improved, mechanically operated recirculating toilet system with an improved filter pump. Further, there has been described an improved filter structure which avoids buildup of particulate matter on the individual needles of the filter comb. Also, there has been shown a novel liquid injector assembly adapted to dispense a measured amount of chemical to the system with each utilization. Finally, there has been shown a pedal operated hydraulic mechanism for driving the improved filter pump.

What is claimed as new is:

1. in a recirculating sanitary system including a storage tank and a toilet, means connected between the storage tank and the toilet for supplying filtered flushing liquid to the toilet, comprising:

a. pumping means coupled between the tank and the toilet and adapted to store a predetermined quantity of filtered liquid substantially sufficient for a flushing of the toilet;

b. filtering means connected between said pumping means and the storage tank for supplying filtered liquid from the tank to said pumping means; and

c. mechanical means for operating said pumping means and said filtering means including a lever member adapted for pedal actuation to impart a reciprocating motion to said pumping means of sufficient travel to pump a substantial portion of said predetermined quantity of filtered liquid into the toilet;

whereby each actuation of said mechanical means applies a charge offiltered flushin liquid to flush the toilet. 2. The sanitary system of c arm 1, above, wherein said filtering means include a filter plate member having a plurality of apertures, sealingly interposed between the storage tank and said pumping means, and a filter comb plate member having a corresponding plurality of filter teeth fitting within said apertures for defining fluid passages of predetermined size, said filter plate member and said filter comb plate member being adapted for relative motion therebetween.

3, The sanitary system of claim 2, above, further including coupling means for applying reciprocating motion to said filter comb plate member for imparting reciprocal motion thereto, whereby said filter teeth in said apertures prevent passage of particulate matter, the reciprocating motion imparted as between said filter plate member and said filter comb plate member continuously cleaning said apertures and filter teeth.

4. The system of claim 1, above, wherein said pumping means are a hydraulically driven diaphragm pump and said mechanical means include a hydraulic pump assembly cou' pled to said diaphragm pump for applying hydraulic fluid thereto.

5. The system of claim 1, above, wherein said pumping means are a diaphragm pump and said mechanical means include a linkage coupling said lever member to said pump diaphragm for direct operation thereof.

6. The system of claim 1, above, further including fluid injection means adapted to be operated upon each operation of the toilet for supplying a metered amount of a predetermined fluid to the flushing liquid.

7. The system of claim 6, above, wherein said fluid injection means include a hydraulically operated pump coupled to the flush line whereby supplying flushing fluid to the toilet drives said fluid injection means.

8. The system of claim 6, above, wherein said mechanical means include a hydraulic pump assembly coupled to drive said pumping means and said fluid injection means.

9. The system of claim 6, above, wherein said fluid injection means include an aspirator adapter to connect between a fluid reservoir and a flush line whereby each operation of the toilet draws a predetermined amount of fluid into the flush line.

10. The recirculating sanitary system of claim 1, above, wherein a single actuation of said lever member of said mechanical means is adapted to provide a charge of flushing liquid sufficient to completely flush the toilet.

11. The recirculating sanitary system of claim 1, above, wherein two actuations of said lever member of said mechanical means operates said pumping means to provide flushing liquid sufficient to flush the toilet 

1. In a recirculating sanitary system including a storage tank and a toilet, means connected between the storage tank and the toilet for supplying filtered flushing liquid to the toilet, comprising: a. pumping means coupled between the tank and the toilet and adapted to store a predetermined quantity of filtered liquid substantially sufficient for a flushing of the toilet; b. filtering means connected between said pumping means and the storage tank for supplying filtered liquid from the tank to said pumping means; and c. mechanical means for operating said pumping means and said filtering means including a lever member adapted for pedal actuation to impart a reciprocating motion to said pumping means of sufficient travel to pump a substantial portion of said predetermined quantity of filtered liquid into the toilet; whereby each actuation of said mechanical means applies a charge of filtered flushing liquid to flush the toilet.
 2. The sanitary system of claim 1, above, wherein said filtering means include a filter plate member having a plurality of apertures, sealingly interposed between the storage tank and said pumping means, and a filter comb plate member having a corresponding plurality of filter teeth fitting within said apertures for defining fluid passages of predetermined size, said filter plate member and said filter comb plate member being adapted for relative motion therebetween.
 3. The sanitary system of claim 2, above, further including coupling means for applying reciprocating motion to said filter comb plate member for imparting reciprocal motion thereto, whereby said filter teeth in said apertures prevent passage of particulate matter, the reciprocating motion imparted as between said filter plate member and said filter comb plate member continuously cleaning said apertures and filter teeth.
 4. The system of claim 1, above, wherein said pumping means are a hydraulically driven diaphragm pump and said mechanical means include a hydraulic pump assembly coupled to said diaphragm pump for applying hydraulic fluid thereto.
 5. The system of claim 1, above, wherein said pumping means are a diaphragm pump and said mechanical means include a linkage coupling said lever member to said pump diaphragm for direct operation thereof.
 6. The system of claim 1, above, further including fluid injection means adapted to be operated upon each operation of the toilet for supplying a metered amount of a predetermined fluid to the flushing liquid.
 7. The system of claim 6, above, wherein said fluid injection means include a hydraulically operated pump coupled to the flush line whereby supplying flushing fluid to the toilet drives said fluid injection means.
 8. The system of claim 6, above, wherein said mechanical means include a hydraulic pump assembly coupled to drive said pumping means and said fluid injection means.
 9. The system of claim 6, above, wherein said fluid injection means include an aspirator adapter to connect between a fluid reservoir and a flush line whereby each operation of the toilet draws a predetermined amount of fluid into the flush line.
 10. The recirculating sanitary system of claim 1, above, wherein a single actuation of said lever member of said mechanical means is adapted to provide a charge of flushing liquid sufficient to completely flush the toilet.
 11. The recirculating sanitary system of claim 1, above, wherein two actuations of said lever member of said mechanical means operates said pumping means to provide flushing liquid sufficient to flush the toilet. 